WO2018132950A1 - Procédé et dispositif de transmission de signal, émetteur et système de transmission de signal - Google Patents
Procédé et dispositif de transmission de signal, émetteur et système de transmission de signal Download PDFInfo
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- WO2018132950A1 WO2018132950A1 PCT/CN2017/071437 CN2017071437W WO2018132950A1 WO 2018132950 A1 WO2018132950 A1 WO 2018132950A1 CN 2017071437 W CN2017071437 W CN 2017071437W WO 2018132950 A1 WO2018132950 A1 WO 2018132950A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
- H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/25137—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using pulse shaping at the transmitter, e.g. pre-chirping or dispersion supported transmission [DST]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2525—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/212—Mach-Zehnder type
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
Definitions
- the present application relates to the field of communications, and in particular, to a signal transmitting method and apparatus, a transmitter, and a signal transmission system.
- the transmitter held by the user 1 can generate a transmission signal and transmit the transmission signal to the receiver held by the user 2 through the optical fiber to realize the communication between the user 1 and the user 2.
- the transmitter can generate a real type signal and transmit the generated real type signal to the receiver through the optical fiber.
- the real type signal propagates in the optical fiber
- the real type signal is converted into a complex type signal, so that the signal finally received by the receiver is a complex type signal
- the real part signal of the complex type signal is related to the real type signal sent by the transmitter.
- the imaginary part signal of the complex type signal is independent of the real type signal sent by the transmitter.
- the receiver further needs to separately perform power detection on the real part signal and the imaginary part signal in the complex type signal, and further, according to the power detection result of the real part signal and the imaginary part signal The power detection result determines the power of the received complex type signal.
- the imaginary part signal of the complex type signal is independent of the real type signal sent by the transmitter, and the receiver wastes energy for the power detection of the imaginary part signal of the complex type signal, and therefore, the receiver is in power detection.
- the energy waste rate is large.
- the present application provides a signal transmission method and device, a transmitter, and a signal transmission system.
- the technical solution is as follows:
- a signal transmission method for a signal transmitting apparatus, the method comprising:
- the complex type signal is transmitted to the receiver through the optical fiber.
- the real type signal is also subjected to phase rotation processing after the real type signal is generated, a complex type signal is obtained, so that the signal sent to the receiver through the optical fiber is a complex type signal.
- the complex type signal does not change the signal type when transmitted in the optical fiber.
- the real part signal and the imaginary part signal are related to the signal transmitted by the transmitter, so that the receiver receives the received signal.
- the power detection of the partial signal and the imaginary part signal does not cause waste of energy, so the energy waste rate of the receiver in power detection is reduced.
- the signal transmitting device includes: a serialized service data source, a phase rotator, and an electro-optic modulator.
- the generating a real type signal includes:
- Performing a phase rotation process on the real type signal to obtain a complex type signal including:
- Transmitting, by the optical fiber, the complex type signal to a receiver including:
- the complex type signal is transmitted to the receiver by the electro-optic modulator and the optical fiber.
- the signal transmitting device further includes: a dispersion precompensator connected in series between the phase rotator and the electro-optic modulator, the dispersion precompensator comprising: a series fast Fourier transform FFT module , a dispersion pre-compensation module and a first fast inverse Fourier transform IFFT module,
- the method further includes:
- Transmitting the complex type signal to the receiver through the electro-optic modulator and the optical fiber including:
- a first IFFT processed complex type signal is transmitted to the receiver by the electro-optic modulator and the optical fiber.
- the service data source, the phase rotator and the dispersion precompensator in the present application may constitute a transmitting DSP unit, and the dispersion precompensator in the transmitting DSP unit is capable of performing chromatic dispersion precompensation on the signal that the transmitter needs to emit, for the signal to be The dispersion occurring in the fiber is compensated to ensure that the signal received by the receiver is more consistent with the signal received by the transmitter.
- the electro-optic modulator comprises: a serial dual-output digital-to-analog converter DAC and a double-sideband modulation module, and the multi-type signal is transmitted to the receiver by the electro-optic modulator and the optical fiber, including:
- the double-sided band complex type signal is transmitted to the receiver through the double sideband modulation module and the optical fiber.
- the electro-optic modulator in the transmitter includes a dual-output DAC and a double-sideband modulation module, and the signal sent by the transmitter is a DSB signal, and the signal-to-noise ratio of the DSB signal is greater than the signal-to-noise ratio of the SSB signal sent by the transmitter in the related art. Therefore, the signal quality of the transmitter transmitted to the receiver in this application is better.
- the double sideband modulation module in this application may be IQMZM or DDMZM.
- the double-sideband modulation module is an orthogonal Mach-Zehnder modulator IQMZM
- the IQMZM includes: a first Mach-Zehnder modulator MZM, a second MZM, and a third MZM
- Two outputs of the dual output DAC are respectively connected in series with the first MZM and the second MZM, the first MZM is connected in parallel with the second MZM, and the first MZM and the second MZM Both are connected in series with the third MZM, and the third MZM is connected to the receiver through an optical fiber;
- the offset amount of the bias end of the first MZM, the offset amount of the bias end of the second MZM, and the offset amount of the bias end of the third MZM are both
- the double-sideband modulation module is a dual-drive Mach-Zehnder modulator DDMZM, and the DDMZM includes: a first phase modulator PM and a second PM,
- Two outputs of the dual output DAC are connected in series with the first PM and the second PM, respectively, the first PM Connected in parallel with the second PM, and both connected to the receiver through an optical fiber;
- the offset amount of the bias end of the first PM and the offset amount of the bias end of the second PM are both
- At least one of a linear drive amplifier and an attenuator is connected in series between each of the output terminals and the series modulator. Processing the signal through a linear drive amplifier and attenuator improves the signal-to-noise ratio of the signal and improves signal quality.
- the service data source includes: a pseudo-random sequence PRBS signal generating module, a mapping module, a serial-to-parallel conversion module, a zero-padding module, a p-point IFFT module, a cyclic prefix adding module, and a parallel-to-serial conversion module.
- p is a q-th power of 2
- the q is an integer greater than or equal to 1
- the real-type signal is generated by the service data source, including:
- the serial-to-parallel conversion module Performing serial-to-parallel conversion processing on the mapping signal by the serial-to-parallel conversion module to obtain 2m frequency domain signals, where the 2m frequency domain signals include: m positive frequency signals and m negative frequency signals, the m The positive frequency signal is conjugated with the m negative frequency signals one by one;
- a signal transmitting apparatus comprising: a serialized service data source, a phase rotator, and an electro-optic modulator,
- the service data source is used to generate a real type signal
- the phase rotator is configured to perform phase rotation processing on the real type signal to obtain a complex type signal, and a value of a real part signal of the complex type signal is equal to a value of an imaginary part signal;
- the electro-optic modulator is configured to transmit the complex type signal to a receiver over an optical fiber.
- the signal transmitting device further includes: a dispersion precompensator connected in series between the phase rotator and the electro-optic modulator, the dispersion precompensator comprising: an FFT module connected in series, a dispersion pre-compensation module And the first IFFT module,
- the FFT module is configured to perform FFT processing on the complex type signal
- the chromatic dispersion pre-compensation module is configured to perform chromatic dispersion precompensation processing on the FFT processed complex type signal;
- the first IFFT module is configured to perform a first IFFT processing on the complex type signal after the dispersion precompensation process
- the electro-optic modulator is configured to transmit a first IFFT processed complex type signal to the receiver over an optical fiber.
- the electro-optic modulator comprises: a serial dual output DAC and a double sideband modulation module.
- the dual output DAC is configured to process the complex type signal to obtain a real part signal and an imaginary part signal of the complex type signal;
- the dual output DAC is further configured to transmit the real signal and the imaginary part signal to the double sideband modulation module from two outputs of the dual output DAC, respectively;
- the double-sideband modulation module is configured to perform modulation processing on the real part signal and the imaginary part signal to obtain a double sideband Complex signal
- the double sideband modulation module is configured to transmit the double sideband complex type signal to the receiver through the optical fiber.
- the double-sideband modulation module is an IQMZM
- the IQMZM includes: a first MZM, a second MZM, and a third MZM
- Two outputs of the dual output DAC are respectively connected in series with the first MZM and the second MZM, the first MZM is connected in parallel with the second MZM, and the first MZM and the second MZM Both are connected in series with the third MZM, and the third MZM is connected to the receiver through an optical fiber;
- the offset amount of the bias end of the first MZM, the offset amount of the bias end of the second MZM, and the offset amount of the bias end of the third MZM are both
- the double-sideband modulation module is a DDMZM
- the DDMZM includes: a first PM and a second PM
- Two outputs of the dual output DAC are respectively connected in series with the first PM and the second PM, and the first PM is connected in parallel with the second PM, and are connected to the receiver through an optical fiber;
- the offset amount of the bias end of the first PM and the offset amount of the bias end of the second PM are both
- At least one of a linear drive amplifier and an attenuator is connected in series between each of the output terminals and the series modulator.
- the service data source includes: a serialized PRBS signal generating module, a mapping module, a serial-to-parallel conversion module, a zero-padding module, a p-point IFFT module, a cyclic prefix adding module, and a parallel-to-serial conversion module, where the p is 2 Qth power, q is an integer greater than or equal to 1,
- the PRBS signal generating module is configured to generate 2m ⁇ n PRBS signals, where m and n are integers greater than or equal to 1;
- the mapping module is configured to perform mapping processing on the 2m ⁇ n PRBS signals to obtain a mapping signal
- the serial to parallel conversion module is configured to perform a serial-to-parallel conversion process on the mapping signal to obtain 2m frequency domain signals, where the 2m frequency domain signals include: m positive frequency signals and m negative frequency signals, where the m The positive frequency signals are conjugated with the m negative frequency signals one by one;
- the zero padding module is configured to perform zero padding processing on the 2m frequency domain signals to obtain p frequency domain signals;
- the p-point IFFT module is configured to perform p-point IFFT processing on the p frequency-domain signals to obtain p time-domain signals;
- the cyclic prefix adding module is configured to add a cyclic prefix to the p time domain signals to obtain an anti-dispersion signal;
- the parallel-to-serial conversion module is configured to perform parallel-to-serial conversion processing on the anti-dispersion signal to obtain the real number signal.
- a transmitter in a third aspect, characterized in that the transmitter comprises the signal transmitting device of the second aspect.
- a signal transmission system comprising: a transmitter, an optical fiber, and a receiver,
- the transmitter is the transmitter of the third aspect.
- the present application provides a signal transmission method and apparatus, and a signal transmission system.
- the signal transmission method after generating a real type signal, the real type signal is also subjected to phase rotation processing to obtain a complex type.
- the signal is such that the signal sent to the receiver through the optical fiber is a complex type signal.
- the complex signal does not change when transmitted in the fiber.
- Signal type, the complex type signal received by the receiver, the real part signal and the imaginary part signal are related to the signal transmitted by the transmitter, so that the receiver does not detect the power of the received real part signal and the imaginary part signal. This results in wasted energy, thus reducing the energy waste rate of the receiver during power detection.
- FIG. 1 is a schematic structural diagram of a signal transmission system according to an embodiment of the present invention.
- FIG. 2 is a schematic structural diagram of a receiver according to an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of a receiving DSP unit according to an embodiment of the present disclosure.
- FIG. 4 is a schematic structural diagram of a signal transmitting apparatus according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of another signal transmitting apparatus according to an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of a double-sideband modulation module according to an embodiment of the present invention.
- FIG. 7 is a schematic structural diagram of another double-sideband modulation module according to an embodiment of the present disclosure.
- FIG. 8 is a schematic structural diagram of a service data source according to an embodiment of the present disclosure.
- FIG. 9 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention.
- FIG. 10 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention.
- FIG. 11 is a schematic structural diagram of a transmitter provided by a related art
- FIG. 12 is a schematic diagram of a spectrum according to an embodiment of the present invention.
- FIG. 13 is a schematic diagram of an SNR waveform according to an embodiment of the present invention.
- FIG. 14 is a schematic diagram of real-signal detection of a signal received by a receiver according to an embodiment of the present invention.
- 15 is a schematic diagram of detecting an imaginary part signal of a signal received by a receiver according to an embodiment of the present invention.
- 16 is a schematic diagram of real-body signal detection of a signal received by a receiver according to the related art
- 17 is a schematic diagram of detecting an imaginary part signal of a signal received by a receiver according to the related art
- FIG. 18 is a schematic diagram of another SNR waveform according to an embodiment of the present invention.
- the signal transmission system 0 may include a transmitter 01, an optical fiber 02, and a receiver 03, and a transmitter 01 and a receiver.
- 03 Establish a communication connection through fiber optics.
- the transmitter 01 may include a signal transmitting device, and the structure of the signal transmitting device may refer to the structure shown in FIGS. 4 to 8.
- An optical fiber amplifier can be disposed on the optical fiber 02, and the optical fiber amplifier can be used to amplify a signal on the optical fiber.
- FIG. 2 is a schematic structural diagram of a receiver 03 according to an embodiment of the present invention.
- the receiver 03 may include a filter 031 and a light receiving unit (English: Receiver optical sub assembly; ROSA for short).
- 032 analog to digital converter (English: Analog to digital converter; abbreviation: ADC) 033 and received digital signal processing (English: Digital Signal Processing; referred to as: DSP) unit 034.
- ADC Analog to digital converter
- DSP Digital Signal Processing
- FIG. 3 is a schematic structural diagram of a receiving DSP unit 034 according to an embodiment of the present invention.
- the receiving DSP unit 034 may include: a resampling module 0341, a synchronization module 0342, and a nonlinear equalization in series.
- NLE non linear equlization; abbreviation: NLE
- module 0343 cyclic prefix deletion (English: Cyclic prefix removal; referred to as: CP Removing) module 0344, serial (English: Series / Parallel; referred to as: S / P) conversion module 0345, Fast Fourier Transform Algorithm (FFT) module 0346, 1-Tap Equlization module 0347, demapping (English: Demapping) module 0348, parallel string (English: Parallel /Series; abbreviation: P/S) conversion module 0349 and bit error rate (English: Bit Error Rate; BER) calculation module 0350.
- FFT Fast Fourier Transform Algorithm
- the function of the resampling module 0341 is to match the sampling rate of the analog to digital conversion unit and the receiving DSP unit; the function of the synchronization module 0342 is to find the starting point of the signal, so as to correctly process the signal; the function of the NLE module 0343 is to compensate the system.
- Nonlinear noise the function of CP Removing module 0344 is to remove the cyclic prefix in the signal; the function of S/P conversion module 0345 is to convert the signal in series into a parallel signal; the function of FFT module 0346 is to convert the time domain signal into Frequency domain signal; 1-Tap Equlization module 0347 is to compensate the bandwidth effect of the system; Demapping module 0348 is to convert the symbol information into bit information; P/S conversion module 0349 is used to parallelize by parallel and serial conversion The signal is converted into a series signal; the function of the BER calculation module 0350 compares the bit signal received by the receiver with the bit signal sent by the transmitter to calculate the bit error rate.
- FIG. 4 is a schematic structural diagram of a signal transmitting apparatus 1 according to an embodiment of the present invention.
- the transmitter 01 in the signal transmission system 0 shown in FIG. 1 may include the signal transmitting apparatus 1, as shown in FIG.
- the apparatus 1 may comprise a service data source 10, a phase rotator 11 and an electro-optic modulator 12 connected in series.
- the service data source 10 is configured to generate a real type signal; the phase rotator 11 is configured to perform phase rotation processing on the real type signal generated by the service data source 10 to obtain a complex type signal, and it should be noted that the complex type signal is real.
- the value of the portion signal is equal to the value of the imaginary part signal; the electro-optic modulator 12 is configured to transmit a complex type signal to the receiver through the optical fiber.
- the signal transmitting apparatus performs phase rotation processing on the real type signal after generating the real type signal, and obtains a complex type signal, so that the signal sent to the receiver through the optical fiber is Complex type signal.
- the complex type signal does not change the signal type when transmitted in the optical fiber.
- the real part signal and the imaginary part signal are related to the signal transmitted by the transmitter, so that the receiver receives the received signal.
- the power detection of the partial signal and the imaginary part signal does not cause waste of energy, so the energy waste rate of the receiver in power detection is reduced.
- the real type signal generated by the service data source may be a four-level pulse amplitude modulation (English: Pulse amplitude modulation-4; abbreviation: PAM4) signal, or other modulation signals, such as an on-off key control (English: On-off Keying; abbreviation: OOK) signal, direct multi-tone technology (English: Direct multi-tone technology; referred to as: DMT) signal or carrierless amplitude phase modulation (English: Carriless amplitude phase modulation; referred to as: CAP) signal.
- PAM4 Pulse amplitude modulation-4
- OOK On-off Keying
- DMT Direct multi-tone technology
- CAP carrierless amplitude phase modulation
- the phase rotator may include: a power dividing circuit, a phase converting circuit, and an adding circuit, wherein the power dividing circuit may divide a real type signal generated by the service data source into two real type signals, for example, the two The road real type signal includes a first real type signal and a second real type signal; the phase converting circuit may perform phase transformation processing on the first real type signal of the two real type signals to obtain an imaginary type signal; the adding circuit may The second real type signal is added to the imaginary type signal to obtain a complex type signal.
- FIG. 5 is a schematic structural diagram of another signal transmitting apparatus 1 according to an embodiment of the present invention.
- the information transmitting apparatus 1 may further include: a phase rotator 11 and an electro-optic unit.
- Dispersion between modulators Precompensator 13 may include an FFT module 131, a dispersion precompensation module 132, and an Inverse Fast Fourier Transformation (IFFT) module 133 connected in series.
- IFFT Inverse Fast Fourier Transformation
- the FFT module 131 can be used to perform FFT processing on the complex type signal; the dispersion precompensation module 132 is configured to perform chromatic dispersion precompensation processing on the FFT processed complex type signal.
- the dispersion precompensation module 132 can be a frequency domain.
- the frequency domain multiplication circuit is configured to multiply the FFT-processed complex type signal and the inverse function of the frequency domain corresponding curve of the optical fiber to implement chromatic dispersion precompensation processing of the FFT processed complex type signal;
- An IFFT module 133 is configured to perform a first IFFT processing on the complex pre-compensation processed complex type signal;
- the electro-optical modulator is configured to transmit the first IFFT processed complex type signal to the receiver through the optical fiber.
- the electro-optic modulator may include: a dual-output digital-to-analog converter (English: Digital to Analog Converter; DAC) 121 and a double-side modulation module (English: Double Sideband Modulation; DSB) 122.
- DAC Digital to Analog Converter
- DSB Double Sideband Modulation
- the dual output DAC 121 can be used to process the complex type signal to obtain the real part signal and the imaginary part signal of the complex type signal; the dual output DAC 121 is also used to respectively output from the two outputs of the dual output DAC 121 (output side) D1 and the output terminal D2) transmit the real part signal and the imaginary part signal to the double sideband modulation module 122; the double sideband modulation module 122 is configured to modulate the received real part signal and the imaginary part signal to obtain a double sideband complex type signal The double sideband modulation module 122 is also operative to transmit a double-band complex type signal to the receiver through the optical fiber.
- the double-sideband modulation module 122 in the embodiment of the present invention may have various forms, and two of them are exemplarily explained in detail below:
- FIG. 6 is a schematic structural diagram of a double-sideband modulation module according to an embodiment of the present invention.
- the double-sideband modulation module is an orthogonal Mach-Zehnder Modulator (English: IQ Mach-Zehnder Modulator) Abbreviation: IQMZM), for example, the IQMZM may include: a first Zernder Modulator (English: Zehnder Modulator; MZM for short) 1221, a second MZM 1222, and a third MZM 1223.
- the two outputs of the dual output DAC are connected in series with the first MZM 1221 and the second MZM 1222, respectively.
- the two outputs of the dual output DAC are respectively connected to the RF terminal RF1 of the first MZM 1221 and the RF terminal RF2 of the second MZM 1222. connection.
- the first MZM 1221 is connected in parallel with the second MZM 1222, and both the first MZM 1221 and the second MZM 1222 are connected in series with the third MZM 1223, and the third MZM 1223 is connected to the receiver via an optical fiber.
- the offset amount of the bias terminal Bais1 of the first MZM 1221, the offset amount of the bias terminal Bais2 of the second MZM, and the offset amount of the bias terminal Bais3 of the third MZM may both be
- the third MZM can be composed of two phase modulators (English: Phase modu1ator; abbreviation: PM).
- the electro-optic modulator shown in FIG. 5 may further include a light source 123 connected to the optical input end of the double-sideband modulation module 122. 5 and FIG. 6, the light source 123 can be connected to the light input end S1 of the first MZM 1221 and the light input end S2 of the second MZM, and the light signal emitted by the light source 123 can be input to the first MZM 1221 through the light input terminal S1.
- the first MZM 1221 can load the RF signal input by the RF input terminal RF1 on the optical signal and transmit it to the optical input terminal S3 of the third MZM 1223, and the second MZM 1222 can
- the RF signal input from the RF input terminal RF2 is loaded on the optical signal and transmitted to the optical input terminal S3 of the third MZM 1223.
- the third MZM 1223 processes the received two RF signals loaded on the optical signal to obtain a double-sided band complex type. The signal is applied to the optical signal on the optical signal and transmitted to the receiver through the optical fiber.
- FIG. 7 is a schematic structural diagram of another double-sideband modulation module according to an embodiment of the present invention, as shown in FIG. 7.
- the double-band modulation module 122 can be a dual-driver Mach-Zehner modulator (English: Dual-driver Mach-Zehner modulator; DDMZM for short), and the DDMZM can include: a first PM 1224 and a second PM 1225.
- DDMZM Dual-driver Mach-Zehner modulator
- the two outputs of the dual output DAC are respectively connected in series with the first PM 1224 and the second PM 1225.
- the two outputs of the dual output DAC are respectively connected to the RF terminal RF3 of the first PM 1224 and the RF terminal RF4 of the second PM 1224. connection.
- the first PM 1224 is connected in parallel with the second PM 1225 and is connected to the receiver via an optical fiber.
- the offset amount of the bias terminal Bais4 of the first PM 1224 and the offset amount of the bias terminal Bais5 of the second PM are both
- the electro-optic modulator 12 shown in FIG. 5 may further include a light source 123 connected to the optical input end of the double-sideband modulation module 122. 5 and 7, the light source 123 can be connected to the light input end S4 of the first PM 1224 and the light input end S5 of the second PM 1225.
- the light signal emitted by the light source 123 can be input to the first PM through the light input terminal S4. 1224, and inputting the second PM 1225 through the optical input terminal S5, the first PM 1224 can load the RF signal input from the RF input terminal RF3 on the optical signal and transmit the optical signal to the optical fiber, and the second PM 1225 can input the RF input RF input terminal RF4.
- the signal is transmitted to the optical fiber on the optical signal, and the two RF signals received by the optical fiber can be aggregated into a double-band complex signal, and the double-band complex signal can be transmitted to the receiver through the optical fiber.
- At least one of a linear drive amplifier and an attenuator may be connected in series between each output of the dual output DAC and a series modulator (such as MZM or PM).
- a series modulator such as MZM or PM.
- a linear drive amplifier 14 and an attenuator 15 are connected in series to each of the outputs connected to the double side modulation module 122. .
- FIG. 8 is a schematic structural diagram of a service data source 10 according to an embodiment of the present invention.
- the service data source 10 may include: a pseudo random sequence (Pseudorandom binary sequence; PRDB) signal generation module 101.
- the mapping module 102 the serial-to-parallel conversion module 103, the zero-padding module 104, the p-point IFFT module 105, the cyclic prefix adding module 106, and the parallel-serial conversion module 107, wherein p can be a q-th power of 2, and q is greater than or equal to An integer of 1, optionally, p can be 512.
- the PRBS signal generating module 101 can be used to generate 2m x n PRBS signals, both of which are integers greater than or equal to one.
- the mapping module 102 can be configured to perform mapping processing on the 2m ⁇ n PRBS signals generated by the PRBS signal generating module to obtain a mapping signal.
- the serial-to-parallel conversion module 103 may be configured to perform a serial-to-parallel conversion process on the mapping signal to obtain 2m frequency domain signals, where the 2m frequency domain signals may include: m positive frequency signals and m negative frequency signals, and the m The positive frequency signals are conjugated with m negative frequency signals one by one.
- the zero padding module 104 can be used to perform zero padding on the 2m frequency domain signals obtained by the serial to parallel conversion module 103 to obtain p frequency domain signals.
- the p-point IFFT module 105 can be used to perform p-point IFFT processing on the p frequency-domain signals obtained by the zero-padding module 104 to obtain p time-domain signals.
- the cyclic prefix adding module 106 is configured to add a cyclic prefix to the p time domain signals to obtain an anti-dispersion signal.
- the parallel-to-serial conversion module 107 can be used to perform parallel-to-serial conversion processing on the anti-dispersion signal to obtain a real-numbered signal.
- the service data source, the phase rotator and the dispersion precompensator may constitute a transmitting DSP unit, and the signal transmitting device may include a transmitting DSP unit and an electro-optic modulator.
- the signal transmitting apparatus performs phase rotation processing on the real type signal after generating the real type signal, and obtains a complex type signal, so that the signal sent to the receiver through the optical fiber is Complex type signal.
- the complex type signal does not change the signal type when transmitted in the optical fiber.
- the real part signal and the imaginary part signal are related to the signal transmitted by the transmitter, so that the receiver receives the received signal.
- the power detection of the partial signal and the imaginary part signal does not cause waste of energy, so the receiver is reduced in power detection. Energy waste rate.
- FIG. 9 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention.
- the method for transmitting a signal may be used in the signal transmitting apparatus 1 shown in FIG.
- Step 901 Generate a real type signal.
- Step 902 Perform phase rotation processing on the real type signal to obtain a complex type signal, and the value of the real part signal of the complex type signal is equal to the value of the imaginary part signal.
- Step 903 transmitting a complex type signal to the receiver through the optical fiber.
- the signal transmitting device after generating the real type signal, performs phase rotation processing on the real type signal to obtain a complex type signal, and receives the signal through the optical fiber.
- the signal sent by the machine is a complex type signal.
- the complex type signal does not change the signal type when transmitted in the optical fiber.
- the real part signal and the imaginary part signal are all related to the signal transmitted by the signal transmitting apparatus, so that the receiver receives the received signal.
- the power detection of the real part signal and the imaginary part signal does not cause waste of energy, so the energy waste rate of the receiver in power detection is reduced.
- FIG. 10 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention.
- the signal transmitting method may be used in the signal transmitting apparatus 1 shown in FIG. 5.
- the signal transmitting apparatus may include: a serialized service data source and a phase.
- the rotator and the electro-optic modulator, the signal transmission method may include:
- Step 1001 Generate a real type signal by using a service data source.
- 2m ⁇ n PRBS signals may be first generated by the PRBS signal generating module, where both m and n may be integers greater than or equal to 1. Then, 2m ⁇ n PRBS signals can be mapped by the mapping module to obtain a mapping signal, and the mapping signal is serial-to-parallel converted by the serial-to-parallel conversion module to obtain 2m frequency domain signals, that is, 2m ⁇ n
- the PRBS signals are converted into 2m parallel frequency domain signals by series.
- the 2m frequency domain signals may include: m positive frequency signals and m negative frequency signals, and the m positive frequency signals are conjugated with the m negative frequency signals one by one.
- the zero-padding module can perform zero-padding processing on the 2m frequency-domain signals to obtain p frequency-domain signals.
- p is 512 as an example. In practical applications, p can also be used.
- p is the qth power of 2, and q is an integer greater than or equal to 1. Then, the p frequency-domain signals obtained by the zero-padding process are subjected to p-point IFFT processing by the p-point IFFT module to obtain p time-domain signals.
- the cyclic prefix adding module adds a cyclic prefix to the p time domain signals to obtain an anti-dispersion signal, and performs parallel-to-serial conversion processing on the dispersion signal by the parallel-to-serial conversion module to obtain a real number signal.
- Step 1002 Perform phase rotation processing on the real type signal by the phase rotator to obtain a complex type signal.
- the value of the real part signal of the complex type signal is equal to the value of the imaginary part signal.
- the obtained complex type signal may be A+jA, wherein the complex type signal A+jA
- the real part signal is A
- the imaginary part signal of the complex type signal A+jA is A
- j is an imaginary unit, that is, the real part signal (A) of the complex type signal A+jA is equal to the imaginary part signal (A).
- Step 1003 Perform FFT processing on the complex type signal by using the FFT module.
- the signal transmitting apparatus 1 may further include: a dispersion precompensator 13 connected in series between the phase rotator 11 and the electro-optic modulator 12, the dispersion precompensator 13 may include: an FFT in series Module 131, dispersion The pre-compensation module 132 and the first IFFT module 133.
- the complex type signal A+jA obtained in step 1002 can be processed by the FFT module to obtain fft(A+jA).
- Step 1004 Perform chromatic dispersion precompensation processing on the FFT processed complex type signal by using a dispersion pre-compensation module.
- the FFT-processed complex type signal that is, fft(A+jA)
- the dispersion pre-compensation module can be processed by the dispersion pre-compensation module to obtain fft(A+jA)*CD -1 .
- the service data source, the phase rotator and the dispersion precompensator may constitute a transmitting DSP unit, and the chromatic dispersion precompensator in the transmitting DSP unit can perform chromatic dispersion precompensation on the signal that the transmitter needs to send, for The dispersion of the signal in the fiber is compensated to ensure that the signal received by the receiver is more consistent with the signal received by the transmitter.
- Step 1005 Perform a first IFFT processing on the complex type signal after the dispersion pre-compensation process by using the first IFFT module.
- step 1005 may be processed by the first IFFT module for complex-type signal dispersion pre-compensation process, i.e. fft (A + jA) * CD -1, to give ifft [fft (A + jA) * CD - 1 ].
- Step 1006 The first IFFT processed complex type signal is transmitted to the receiver through the electro-optic modulator and the optical fiber.
- the electro-optic modulator may include: a dual-output DAC and a double-side modulation module in series.
- the complex signal may be processed by the dual output DAC to obtain a real signal of the complex signal and The imaginary part signal is then transmitted from the two outputs of the dual output DAC to the double sideband modulation module through the dual output DAC, and the real and imaginary signals are modulated by the double sideband modulation module Processing, obtaining a double-band complex type signal, and transmitting a double-band complex type signal to the receiver through the double-sideband modulation module and the optical fiber.
- the double-sideband modulation module may be an IQMZM
- the IQMZM includes: a first MZM, a second MZM, and a third MZM, and two outputs of the dual output DAC are respectively connected in series with the first MZM and the second MZM.
- the first MZM is connected in parallel with the second MZM, and both are connected in series with the third MZM, and the third MZM is connected to the receiver through the optical fiber; optionally, the offset of the bias end of the first MZM and the offset of the second MZM
- the offset of the terminal and the offset of the bias of the third MZM may be
- the double-sideband modulation module may also be a DDMZM
- the DDMZM includes: a first phase modulator PM and a second PM, and two outputs of the dual output DAC are respectively associated with the first PM and the second PM.
- the first PM is connected in parallel with the second PM, and is connected to the receiver through the optical fiber; optionally, the offset of the biasing end of the first PM and the offset of the biasing end of the second PM are both
- the signal E Rosa transmitted through the fiber to the receiver can be:
- the receiver can perform power detection on the received signal, and the real part signal and the imaginary part signal of the complex type signal received by the receiver are both generated by the real data type generated by the service data source in step 1001.
- Signal A is related, so the receiver does not waste energy when performing power detection on the received signal.
- the optical power P detected by the receiver can be:
- the transmitter 110 includes an electro-optic modulator 1101 and a transmitting DSP unit 1102 (the transmitting DSP unit 1102 and the transmitting in the present application).
- the DSP unit is different.
- the electro-optic modulator 1101 includes a dual output DAC and a single sideband modulation unit (English: Single Sideband Modulation; SSB for short), and the signal sent by the transmitter is an SSB signal.
- the electro-optic modulator in the transmitter comprises a dual output DAC and a double sideband modulation module, and the signal emitted by the transmitter is a DSB signal.
- FIG. 12 is a schematic diagram of an optical spectrum (English: Optical Spectra) according to an embodiment of the present invention.
- the horizontal axis of the spectrum diagram is an optical frequency (English: Optical Frequency), and the unit is terahertz (English: Tera Hertz; referred to as THz), the vertical axis is optical power (English: Optical Power), the unit is: milli decibel (abbreviation: dBm).
- the spectrum of the SSB signal can be divided into two sidebands (left side 1 and right side 1 respectively), and the spectrum of the DSB signal can also be divided into two sidebands (left side 2 and right side respectively).
- Band 2 wherein the left and right bands of the DSB signal contain valid information, the right band of the SSB signal contains valid information, and the left band of the SSB signal (1 band on the left) contains only noise information and does not contain valid information.
- FIG. 13 is a schematic diagram of an SNR waveform according to an embodiment of the present invention.
- the horizontal axis of the waveform diagram may be the relative frequency (dimensionless) of the base carrier (English: subcarrier), and the vertical axis is the SNR (dimensionless) of the signal.
- the SNR of the DSB signal is greater than the SNR of the SSB signal.
- the transmitter first generates the real type signal A, and the signal E out output to the optical fiber after the dispersion compensation processing and the photoelectric modulation can be:
- the signal sent through the fiber to the receiver can be expressed as:
- the optical power P detected by the receiver can be:
- the real part signal (1+A) is related to the signal A generated by the transmitter, and the imaginary part signal (1) is independent of the signal A generated by the transmitter.
- the receiver wastes energy for the power detection of the imaginary part signal of the complex type signal, and therefore, the energy waste rate of the receiver in power detection is large.
- the power of the signal received by the receiver (2A) is lower.
- the receiver since the real part signal (1+A) and the imaginary part signal (1+A) in the signal received by the receiver are both related to the signal A generated by the transmitter, the receiver receives The power of the signal is high, and the optical power 4A of the signal received by the receiver in the embodiment of the present invention is twice the optical power 2A of the signal received by the receiver in the related art.
- FIG. 14 is a schematic diagram of real part signal detection of a signal received by a receiver according to an embodiment of the present invention
- FIG. 15 is a schematic diagram of detecting an imaginary part signal of a signal received by a receiver according to an embodiment of the present invention
- FIG. 17 is a schematic diagram of detecting an imaginary part of a signal received by a receiver according to the related art.
- the horizontal axes in FIGS. 14 , 15 , 16 , and 17 are relative time domains (dimensionless), and the unit is 10 4 , and the vertical axis is the amplitude of the signal, and the unit is volt.
- the real part signal and the imaginary part signal of the complex type signal received by the receiver in the embodiment of the present invention all contain more effective information, and are all related to the real type signal generated by the transmitter.
- the real part signal contains more effective information
- the imaginary part signal only contains more noise information
- the receiver receives The real part of the complex type signal is related to the real type signal generated by the transmitter, and the imaginary part signal is independent of the real type signal generated by the transmitter.
- FIG. 18 is a schematic diagram of another SNR waveform according to an embodiment of the present invention.
- the horizontal axis of the waveform diagram may be the relative frequency of the base carrier, and the vertical axis is the SNR of the signal.
- the signal-to-noise ratio of the signal U received by the receiver in the embodiment of the present invention is greater than the signal-to-noise ratio of the signal V received by the receiver in the related art.
- the signal transmitting device after generating the real type signal, performs phase rotation processing on the real type signal to obtain a complex type signal, and receives the signal through the optical fiber.
- the signal sent by the machine is a complex type signal.
- the complex type signal does not change the signal type when transmitted in the optical fiber.
- the real part signal and the imaginary part signal are all related to the signal transmitted by the signal transmitting apparatus, so that the receiver receives the received signal.
- the power detection of the real part signal and the imaginary part signal does not cause waste of energy, so the energy waste rate of the receiver in power detection is reduced.
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Abstract
La présente invention concerne le domaine des communications, et concerne un procédé et un dispositif de transmission de signal, un émetteur et un système de transmission de signal. Le procédé comprend : la génération d'un signal en nombre réel ; la réalisation d'un traitement de rotation de phase sur le signal en nombre réel pour obtenir un signal à numéro complexe, la valeur d'un signal en partie réelle du signal de nombre complexe étant égale à la valeur d'un signal de partie imaginaire de ce dernier ; et la transmission du signal de nombre complexe à un récepteur. La présente invention résout le problème du taux de gaspillage d'énergie élevé du récepteur lors de la détection de puissance, et reçoit le taux de gaspillage d'énergie du récepteur lors de la détection de puissance. La présente invention est utilisée pour la transmission d'un signal.
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CN201780083698.XA CN110178321B (zh) | 2017-01-17 | 2017-01-17 | 信号发射方法及装置、发射机、信号传输系统 |
EP17892294.4A EP3562067A4 (fr) | 2017-01-17 | 2017-01-17 | Procédé et dispositif de transmission de signal, émetteur et système de transmission de signal |
US16/510,418 US10944475B2 (en) | 2017-01-17 | 2019-07-12 | Signal transmitting method and apparatus, transmitter, and signal transmission system |
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CN111131122B (zh) * | 2019-12-31 | 2022-10-18 | 武汉邮电科学研究院有限公司 | 基于dmt调制和拍频检测的光传输系统均衡方法及装置 |
CN113595640B (zh) * | 2020-04-30 | 2023-06-27 | 华为技术有限公司 | 一种信号处理方法及装置 |
CN112564816B (zh) * | 2020-11-04 | 2022-03-08 | 中山大学 | 一种基于时域迭代的单边带信号恢复算法 |
CN112804007B (zh) * | 2021-04-13 | 2021-08-31 | 网络通信与安全紫金山实验室 | 面向光载无线通信系统的双信号调制和解调方法及装置 |
CN115225086B (zh) * | 2022-05-09 | 2023-03-14 | 成都动力比特科技有限公司 | 一种基于非均匀采样的模拟数字转换装置及方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1972161A (zh) * | 2005-11-25 | 2007-05-30 | 阿尔卡特公司 | 用于dqpsk调制信号的光纤传输系统、发射机和接收机及方法 |
CN101622845A (zh) * | 2007-01-05 | 2010-01-06 | 高通股份有限公司 | 用于活动式if架构的i/q校准 |
US20130077979A1 (en) * | 2011-09-26 | 2013-03-28 | Fujitsu Limited | Nonlinear compensating apparatus and method and transmitter |
CN103873424A (zh) * | 2012-12-12 | 2014-06-18 | 中兴通讯股份有限公司 | 一种适用于正交频分多址无源光网络的系统、设备及调制解调方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4896287A (en) * | 1988-05-31 | 1990-01-23 | General Electric Company | Cordic complex multiplier |
JPH0983588A (ja) * | 1995-09-18 | 1997-03-28 | Mitsubishi Electric Corp | 復調器及び変復調システム及び復調方法 |
WO2002028126A1 (fr) * | 2000-08-31 | 2002-04-04 | Huawei Technologies Co., Ltd. | Procede de modulation par deplacement de 8 phases (8mdp) et dispositif associe |
US7263150B2 (en) * | 2001-03-20 | 2007-08-28 | Advantest Corp. | Probability estimating apparatus and method for peak-to-peak clock skews |
US6967976B2 (en) | 2002-08-29 | 2005-11-22 | Picarro, Inc. | Laser with reflective etalon tuning element |
JP4641233B2 (ja) * | 2005-09-14 | 2011-03-02 | ルネサスエレクトロニクス株式会社 | 復調装置及び復調方法 |
JP5850041B2 (ja) * | 2011-03-02 | 2016-02-03 | 日本電気株式会社 | 光受信器、偏波分離装置、および光受信方法 |
US8983309B2 (en) * | 2012-02-13 | 2015-03-17 | Ciena Corporation | Constrained continuous phase modulation and demodulation in an optical communications system |
KR20140093099A (ko) * | 2013-01-17 | 2014-07-25 | 한국전자통신연구원 | 광망 종단장치 및 광회선단말을 포함하는 직교 주파수 분할 다중접속 수동형 광가입자망 |
US9749047B2 (en) * | 2014-04-23 | 2017-08-29 | Industry-Academic Foundation, Yonsei University | Optical network unit capable of reducing optical beat interference and method for controlling the same |
JP6651697B2 (ja) * | 2015-01-26 | 2020-02-19 | 株式会社ソシオネクスト | 電子回路、電源回路、回路の特性測定方法、及び振幅及び位相特性の演算プログラム |
CN105530054B (zh) * | 2015-12-14 | 2018-03-20 | 武汉邮电科学研究院 | 基于ask和dbpsk的强度调制相干检测系统及方法 |
-
2017
- 2017-01-17 WO PCT/CN2017/071437 patent/WO2018132950A1/fr unknown
- 2017-01-17 CN CN201780083698.XA patent/CN110178321B/zh active Active
- 2017-01-17 EP EP17892294.4A patent/EP3562067A4/fr active Pending
-
2019
- 2019-07-12 US US16/510,418 patent/US10944475B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1972161A (zh) * | 2005-11-25 | 2007-05-30 | 阿尔卡特公司 | 用于dqpsk调制信号的光纤传输系统、发射机和接收机及方法 |
CN101622845A (zh) * | 2007-01-05 | 2010-01-06 | 高通股份有限公司 | 用于活动式if架构的i/q校准 |
US20130077979A1 (en) * | 2011-09-26 | 2013-03-28 | Fujitsu Limited | Nonlinear compensating apparatus and method and transmitter |
CN103873424A (zh) * | 2012-12-12 | 2014-06-18 | 中兴通讯股份有限公司 | 一种适用于正交频分多址无源光网络的系统、设备及调制解调方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3562067A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112690026A (zh) * | 2018-08-09 | 2021-04-20 | Lg 电子株式会社 | 在无线通信系统中发送/接收信号的方法及支持其的设备 |
CN112690026B (zh) * | 2018-08-09 | 2023-08-25 | Lg 电子株式会社 | 在无线通信系统中发送/接收信号的方法及支持其的设备 |
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US10944475B2 (en) | 2021-03-09 |
CN110178321A (zh) | 2019-08-27 |
US20190334620A1 (en) | 2019-10-31 |
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